Enhanced peak separation in XPS with external biasing

被引：36

作者：

Ertas, G ^{[1
]}

Demirok, UK ^{[1
]}

Suzer, S ^{[1
]}

机构：

[1] Bilkent Univ, Dept Chem, TR-06800 Ankara, Turkey

来源：

APPLIED SURFACE SCIENCE | 2005年 / 249卷 / 1-4期

关键词：

external biasing; differential charging; peak separation; gold nanoclusters;

D O I：

10.1016/j.apsusc.2004.11.086

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We have demonstrated that the An 4f peaks of the capped gold nanoparticles deposited on a SiO2 (20 nm)/Si substrate can be separated form the An 4f peaks of a gold metal strip, in contact with the same sample, by application of an external voltage bias to the sample rod while recording the XPS spectra. The external bias controls the flow of low-energy electrons falling on to the sample which in-turn controls the extent of the differential charging of the oxide layer leading to shifts in the binding energy of the gold nanoparticles in contact with the layer. The method is simple and effective for enhancing peak separation and identification of hetero-structures. (c) 2004 Elsevier B.V. All rights reserved.

引用

页码：12 / 15

页数：4

共 28 条

[1] Optical absorption spectra of nanocrystal gold molecules [J].